Low Frequency (LF) RFID It's usually called ID card ,is a band on the radio frequency spectrum that typically operates between 125 kHz and 134 kHz. Technically, LF applications can operate on a larger frequencyspectrumfrom 30 kHz to 300 kHz;and it ispassive card, however, the specific frequencyvaries from country to country and depends on frequencies set aside for radio and marine life tracking. LF RFID communicates in a similar fashion to HF/NFC RFID in that it uses electromagnetic coupling to send and receive signals. Below are a few facts about LF RFID: 1:Only small amounts of data can be stored on the tags. 2:LF tags are typically smaller than other types of RFID tags. 3:LF systems have shorter read ranges than both HF and UHF RFID. 4:LF tags are able to operate around liquid or metal items. 5:LF tags require less energy to operate. 6:The main application for LF RFID is animal tracking.access control system